Pi Kappa Phi (ΠΚΦ; also Pi Kapp or PKP) is an American Greek Letter secret and social fraternity. It was founded by Andrew Alexander Kroeg Jr., Lawrence Harry Mixson, and Simon Fogarty Jr. on December 10, 1904 at the College of Charleston in Charleston, South Carolina. The fraternity has 179 active chapters (160 chartered chapters and 19 associate chapters),and more than 113,000 initiated members. Pi Kappa Phi operates its own philanthropy, The Ability Experience (formerly known as Push America), which works with individual chapters to serve people with disabilities.